9905601651 has 16 divisors (see below), whose sum is σ = 14420343168. Its totient is φ = 5998313600.

The previous prime is 9905601617. The next prime is 9905601679. The reversal of 9905601651 is 1561065099.

It is a cyclic number.

It is not a de Polignac number, because 9905601651 - 2¹³ = 9905593459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9905601691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87270 + ... + 165611.

It is an arithmetic number, because the mean of its divisors is an integer number (901271448).

Almost surely, 2^9905601651 is an apocalyptic number.

9905601651 is a deficient number, since it is larger than the sum of its proper divisors (4514741517).

9905601651 is a wasteful number, since it uses less digits than its factorization.

9905601651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254082.

The product of its (nonzero) digits is 72900, while the sum is 42.

The square root of 9905601651 is about 99526.8890853120. The cubic root of 9905601651 is about 2147.6340767817.

The spelling of 9905601651 in words is "nine billion, nine hundred five million, six hundred one thousand, six hundred fifty-one".